Interesting, this sounds similar to what killed the Evo piggyback market: a relatively inexpensive way of letting owners and tuners program the ECU. In the case of the Evo it was ECUflash (
www.openecu.org): download the free software, buy a tactrix cable, a logger and you're all set (wideband O2 sensor is handy too). I still have my old Evo piggyback, a paper weight for which I could find no buyer.